Electromagnetic Flow Meter Accuracy: 0.5% to 1% Communications: RS-232, ... throughout industries of petroleum, chemical engineering, pharmacology, papermaking, electric power, environmental protection and so forth. 2. Special Features- zero ... 5%~±1.0%;- Supply power: 85 to 250VAC (45 to 63Hz), 16 to 36VDC;- Signal output: Current Output: 0~10mA ... : RS-232, RS-485,Hart, MODBUS. Electromagnetic Flow Meter